Sheet-metal spool.



M PATENTED JAN. 21, 1909. G. A. BRINLEY. SHEET METAL SPOOL. APPLICATIONFILED JULY 15, 1907.

ESI

INVENTOR. 6mm 5" 0 5mm 15),

two similar disks 1, and a c UNITED STATES PATENT OFFICE.

CHARLES, A. BRINLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEAMERICAN PULLEY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFPENNSYL- VANIA.

SHEET-METAL SPOOL.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed July 15' 1907- Serial No. 383.793'l To all whom it mayconcern:

Be it known that I, CHARLES A. BRINLEY, residing at N o. 247 SouthSixteenth street, in the city of Philadel hia, county of Philadelphia,and State of Pennsylvania, have invented certain new and useful Imrovements in Metal Spools, whereofthe fol owing is a specification,reference being had to the accompanying drawings.

The object of my invention is to provide a spool-shaped structure ofsheet metal, the component elements being so organized as to permittheir union by electric welding.

I will describe a convenient embodiment of m invention which I haveillustrated in the rawin s.

In said rawings, Figure I represents an end view of the spool. Fig. IIis a longitudinal central section through the same, on a plane passingthrough the line IIII of Fig. I.

The spool comprises three elements, to wit, lindrical drum 2, and isformed by electrica ly welding a disk to each end of the drum.Asindicated, all of these parts aremade of sheet metal. The end disks asshown in the drawings are provided with elongated radial dished portions3, to give the disk greater rigidity. The peripheral ed es of the disksmay be turned over into a ead as indicated at 4, or may be plain or flaned or otherwise finished.

- The centra part of each disk is preferably so formed as to aifordaproper bearing surface for mounting the spool upon a shaft or spindle.Thus as shown in the drawings,

' each diskis provided with a concentric annular outward wardly extendinbearing may be y dished portion 5, with an inannular band 6, but theormed in any other known X relatively limited number of small inwardlyextending projections are formed in annular relation to each other uponthat region of each of the disks where attachment is to be made betweenthe disks and-the drum. In Fig. I, the regions of such rojections areindicated by the small circ es marked 7. Said projections aresubstantially obliterated in the process of uniting the drum to thedisks, as hereinafter described, and hence do not appear asprojections-in Fig. II. In the instance shown, said rojections are sixin number upon each dis and they are symmetrically arranged withrelation to the radial dished portions 3, but the number and theposition may be varied within reasonable limits.

The drum of the spool is formed of a sheet of metal, whose meeting edgesneed not be directly secured to one another, but should be in closecontact, and said drum is united at its ends to the metal of the disksat points corresponding to the projections 7, by electric welding. Ihave found that an integral union entirely sufficient for the purposesof a spool, can be obtained by thus limitin the regions of the electricwelding to a relatively small number of oints projecting from thesurface of the disk and that the projections substantially disappear orare merged with the surface of the'metal of the disk under the pressureincident to the welding process.

Instead of providing the disks with projections in the region indicated,a similar series of small projections may be formed around the edgeswhich form the ends of the drum, such projections similarly disa pearingor being merged with the metal un er the pressure incident to thewelding rocess.

I am aware that the method of electric welding at a number of projectingoints is not broadly new, and I do not claim t e same, nor do I broadlyclaim the application of this method to a sheet metal structure. I havefound however, that by availing myself of this method of electricWelding in connection with the structural elements above set forth, Ican produce with great economy the spool .above described, whichpossesses the advantages of extreme lightness and sufiicient strengthfor all the purposes of use.

I claim:

1. In a spool, the combination of an axial ited regions.

Q amass 3. In a, spool, the combination of an axial signed my name, atPhiladelphia,'Pennsyldruml of sheet finetalidarad end disks of sheetvam'e, this tenth day of July 1907 meta,inte a ywe e to sai drum at aplurality 0 limited regions symmetrically CHARLES BRINLEY' 5 disfigsedwith relation to the center of the Witnesses: dis substantially as setforth. RtrssELL H. BOWEN,

In testimony whereof, I have hereunto CHARLES E. BRINLEY.

